Search Results - "Nordheim, T A"

Driver of Energetic Electron Precipitation in the Vicinity of Ganymede by Li, W., Ma, Q., Shen, X.‐C., Zhang, X.‐J., Mauk, B. H., Clark, G., Allegrini, F., Kurth, W. S., Hospodarsky, G. B., Sulaiman, A., Nordheim, T. A., Bolton, S. J.

“…The driver of energetic electron precipitation into Ganymede's atmosphere has been an outstanding open problem. During the Juno flyby of Ganymede on 7 June…”
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Detection of Negative Pickup Ions at Saturn's Moon Dione by Nordheim, T. A., Wellbrock, A., Jones, G. H., Desai, R. T., Coates, A. J., Teolis, B. D., Jasinski, J. M.

“…We investigate a possible negative ion feature observed by the Cassini Plasma Spectrometer (CAPS) during a flyby of Saturn's moon Dione that occurred on 7…”
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Constraining the source regions of lunar meteorites using orbital geochemical data by Calzada-Diaz, A., Joy, K. H., Crawford, I. A., Nordheim, T. A.

“…Lunar meteorites provide important new samples of the Moon remote from regions visited by the Apollo and Luna sample return missions. Petrologic and…”
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Cassini CAPS Identification of Pickup Ion Compositions at Rhea by Desai, R. T., Taylor, S. A., Regoli, L. H., Coates, A. J., Nordheim, T. A., Cordiner, M. A., Teolis, B. D., Thomsen, M. F., Johnson, R. E., Jones, G. H., Cowee, M. M., Waite, J. H.

“…Saturn's largest icy moon, Rhea, hosts a tenuous surface‐sputtered exosphere composed primarily of molecular oxygen and carbon dioxide. In this Letter, we…”
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Feasibility of Passive Sounding of Uranian Moons Using Uranian Kilometric Radiation by Romero‐Wolf, A., Steinbrügge, G., Castillo‐Rogez, J., Cochrane, C. J., Nordheim, T. A., Mitchell, K. L., Wolfenbarger, N. S., Schroeder, D. M., Peters, S.

“…We present a feasibility study for passive sounding of Uranian icy moons using Uranian Kilometric Radio (UKR) emissions in the 100–900 kHz band. We provide a…”
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Detection of a strongly negative surface potential at Saturn's moon Hyperion by Nordheim, T. A., Jones, G. H., Roussos, E., Leisner, J. S., Coates, A. J., Kurth, W. S., Khurana, K. K., Krupp, N., Dougherty, M. K., Waite, J. H.

“…On 26 September 2005, Cassini conducted its only close targeted flyby of Saturn's small, irregularly shaped moon Hyperion. Approximately 6 min before the…”
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Preservation of potential biosignatures in the shallow subsurface of Europa by Nordheim, T. A., Hand, K. P., Paranicas, C.

“…Jupiter’s moon Europa, which is thought to possess a large liquid water ocean beneath its icy crust, is one of the most compelling targets in the search for…”
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Atmospheric Electricity at the Ice Giants by Aplin, K. L., Fischer, G., Nordheim, T. A., Konovalenko, A., Zakharenko, V., Zarka, P.

“…Lightning was detected by Voyager 2 at Uranus and Neptune, and weaker electrical processes also occur throughout planetary atmospheres from galactic cosmic ray…”
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The Origin and Fate of O 2 \(\mbox{O}_{2}\) in Europa’s Ice: An Atmospheric Perspective by Johnson, R E, Oza, A V, Leblanc, F, Schmidt, C, Nordheim, T A, Cassidy, T A

“…The early prediction and subsequent detection of an O2\(\mbox{O}_{2}\) atmosphere on Europa, coupled with the discovery that Europa has an ocean under its ice…”
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Observations of a Solar Energetic Particle Event From Inside and Outside the Coma of Comet 67P by Wellbrock, A., Jones, G. H., Dresing, N., Coates, A. J., Simon Wedlund, C., Nilsson, H., Sanchez‐Cano, B., Palmerio, E., Turc, L., Myllys, M., Henri, P., Goetz, C., Witasse, O., Nordheim, T. A., Mandt, K.

“…We analyze observations of a solar energetic particle (SEP) event at Rosetta's target comet 67P/Churyumov‐Gerasimenko during 6–10 March 2015. The comet was…”
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In Search of Subsurface Oceans Within the Uranian Moons by Cochrane, C. J., Vance, S. D., Nordheim, T. A., Styczinski, M. J., Masters, A., Regoli, L. H.

“…The Galileo mission to Jupiter discovered magnetic signatures associated with hidden subsurface oceans at the moons Europa and Callisto using the phenomenon of…”
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Ionization of the venusian atmosphere from solar and galactic cosmic rays by Nordheim, T.A., Dartnell, L.R., Desorgher, L., Coates, A.J., Jones, G.H.

“…•We have modeled cosmic ray interaction with the venusian atmosphere.•We have computed the ionization rates for typical GCR and SEP conditions.•We provide a…”
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Surface charging and electrostatic dust acceleration at the nucleus of comet 67P during periods of low activity by Nordheim, T.A., Jones, G.H., Halekas, J.S., Roussos, E., Coates, A.J.

“…We have investigated through simulation the electrostatic charging of the nucleus of Comet 67P/Churyumov–Gerasimenko during periods of weak outgassing…”
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Molecular Transport Conditions Required for the Formation of Penitentes on Airless, Ice‐Covered Worlds, With Specific Application to Europa, Enceladus, and Callisto by Macias, A., Carreon, A., Berisford, D. F., Nordheim, T. A., Kale, G., Goldstein, D., Varghese, P., Trafton, L., Steckloff, J., Hand, K. P.

“…The surface morphology of airless, ice‐covered moons of the outer solar system, such as Europa, Enceladus, and Callisto, is not well known at centimeter‐ to…”
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In Search of Subsurface Oceans within the Uranian Moons by Cochrane, C. J, Vance, S. D, Nordheim, T. A, Styczinski, M, Masters, A, Regoli, L. H

“…The Galileo mission to Jupiter discovered magnetic signatures associated with hidden sub-surface oceans at the moons Europa and Callisto using the phenomenon…”
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Atmospheric Electricity at the Ice Giants by Aplin, K. L, Fischer, G, Nordheim, T. A, Konovalenko, A, Zakharenko, V, Zarka, P

“…Space Science Reviews, 216, 26 (2020) Lightning was detected by Voyager 2 at Uranus and Neptune, and weaker electrical processes also occur throughout…”
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Constraints on a potential aerial biosphere on Venus: II. Ultraviolet radiation by Patel, M.R., Mason, J.P., Nordheim, T.A., Dartnell, L.R.

“…Despite the harsh conditions in the atmosphere of Venus, the possibility for an aerial habitable zone exists. A thermal habitable zone is predicted to exist at…”
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Surface composition and properties of Ganymede: Updates from ground-based observations with the near-infrared imaging spectrometer SINFONI/VLT/ESO by Ligier, N., Paranicas, C., Carter, J., Poulet, F., Calvin, W.M., Nordheim, T.A., Snodgrass, C., Ferellec, L.

“…Ganymede's surface exhibits great geological diversity, with old dark terrains, expressed through the surface composition, which is known to be dominated by…”
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Surface composition and properties of Ganymede: Updates from ground-based observations with the near-infrared imaging spectrometer SINFONI/VLT/ESO by Ligier, N, Paranicas, C, Carter, J, Poulet, F, Calvin, W. M, Nordheim, T. A, Snodgrass, C, Ferellec, L

“…Icarus, Volume 333, 15 November 2019, Pages 496-515 Ganymede's surface exhibits great geological diversity, with old dark terrains, expressed through the…”
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The Origin and Fate of O 2 $\mbox{O}_{2}$ in Europa’s Ice: An Atmospheric Perspective by Johnson, R. E., Oza, A. V., Leblanc, F., Schmidt, C., Nordheim, T. A., Cassidy, T. A.

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